JPS59174970A - Graphic element detecting system - Google Patents

Abstract

PURPOSE:To detect easily a graphic element at a high speed, by comparing addresses of an aperture area and graphic element with each other and informing the detection of the graphic element when the address of the graphic element is in the aperture area. CONSTITUTION:An aperture setting circuit 27 sets a fixed aperture area based on coordinate data for detecting graphic elements from a coordinate detecting device 12. Moreover, a graphic generating circuit 23 outputs the address and discriminating code of each graphic element by successively reading out each graphic element stored in a graphic data memory 22. Then addresses of the aperture area from the circuit 27 and graphic element from the circuit 23 are compared with each other at a comparison circuit 37. As a result of this comparison, the circuit 37 informs that the graphic element is detected by means of the discriminating code when the address of the graphic element is in the aperture area.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a graphic display processing device, and more particularly to a graphic element detection method for detecting a desired graphic element from among various graphic elements displayed on a screen.

[Technology background and problems]

A graphic display processing device performs various graphic processing on specific graphic elements among various graphics displayed on the screen, such as moving, enlarging, reducing, deforming, erasing, etc. In order to perform this, a detection operation for certain graphical elements is performed.

FIG. 1 schematically shows a conventional rask scan type graphic display processing device. The display section 11 in the Rask scan type graphic display processing device 10 includes graphic elements A and B.
, C are displayed. When detecting the graphic element A, from the coordinate detection device 12 such as a tablet to the pen 1
3. Move the marker M to a location close to the cis-shaped element A and input the coordinates. The graphic display processing unit 14 calculates the coordinate data of the marker M using a 1fCf program based on the coordinate data of each graphic element stored in the graphic display processing unit 14 and the coordinate data of the marker M from the coordinate detection device 12. Detecting a graphic element with similar coordinate data is performed. ■Or the input coordinates from the coordinate detection device @12 are sent to the external control device after coordinate conversion, and the external control device performs the graphic element detection process. In the illustrated case, the coordinate data of the figure 2) A is close to the coordinate data of the marker M, so the figure 2) A is detected.

However, this conventional graphic element detection method has problems in that the processing is complicated and the detection processing takes time due to program calculation.

[Purpose of the invention]

An object of the present invention is to detect a graphic element that can quickly detect a desired graphic element from among various graphic elements by simple graphic data processing in a rask scan type graphic display processing device equipped with a coordinate detection device. There is a method to provide.

[Structure of the Invention] In order to achieve the above object, in the graphic element detection method of the present invention, in a rask scan type graphic display processing device equipped with a coordinate detection device, a certain an aperture area setting means for setting the aperture area, a graphic generation means for sequentially reading out each graphic element stored in the graphic data memory and outputting the address and identification code of each graphic element, and the aperture area setting means a comparison circuit that compares the address of the graphic element from the aperture area from the graphic generation circuit and the address of the graphic element from the graphic generation circuit, and notifies by its identification code that the graphic element has been detected when the address of the graphic element is within the aperture area. It is characterized by having.

[Embodiments of the invention]

An embodiment of the present invention will be described based on FIGS. 2 to 4.

Fig. 2 is a configuration diagram of an embodiment of the present invention, Fig. 3 is an explanatory diagram of graphic elements and annotations shown on the display section, and Fig. 4 is an explanatory diagram of the graphic r-ta memory and identification code. be.

FIG. 2 shows a block diagram of the graphic display processing section in the rusk scan type graphic display processing device used in the graphic element detection method of the present invention, and the other configuration is the same as that of the conventional one shown in FIG. It is.

That is, a display unit 11 similar to that shown in FIG. 1 is connected to the graphic data processing unit to constitute a rask scan type graphic display processing device, and coordinate data is received from a coordinate detection device 12 similar to that shown in FIG. is input.

It is assumed that three types of graphic elements A, B, and C as shown in FIG. 3 are displayed on the display unit 11. In the graphic display processing section shown in FIG. An external device control circuit that controls the coordinate data input operation of , n is a figure data memory that stores the coordinate data of figures A, B, and C displayed on the display unit 11, and B is a figure data memory that stores each figure from figure data memory n. A figure generation circuit reads the coordinate data of the element and converts it into figure data suitable for display on the display section 11 (not shown); U is a memory control circuit that stores the figure data generated by the figure generation circuit n in the image memory δ; is a P/S that converts parallel graphic data read from the image memory 5 into a serial video signal.
(parallel-serial) converter, n is the aperture AP shown in FIG.
4 is a control program section that controls the operation of each part of the figure display processing section; 4 is a figure data memory N5 figure generation circuit; a processor for generating data, apertures, and detecting graphical elements; and a control signal bus;
1 is a data signal bus 0 interface circuit 19
It is connected to a host computer (not shown).

The figure generation circuit n consists of a figure control circuit 32, a vector generation circuit O, a character generation circuit A, and an address pointer A.

The aperture circuit n consists of an aperture address section holding an aperture area and a comparison circuit 37.

The operation of these circuits will be explained in the following description of the operation of the entire device.

Next, the figure l-A shown in FIG.

Taking as an example the case of detecting graphic element 'A from among B and C, the operation of FIG. 2 will be explained according to the detection procedure.

1. From the coordinate detection device 12 (Fig. 1), the operator
As in the conventional case, the coordinate input data of the marker λ1 is inputted to the external device control circuit 21 of the graphic display processing section by the pin 13, and the coordinate input data of the marker λ1 is inputted to the graphic control circuit, memory control circuit array, image memory 25, P/P. The operator moves the wave 13 while observing the display unit 11 and makes sure that the marker M is on the desired graphic element line AO and Other graphic elements B, C
Move to a part that does not overlap with . In the case shown, it is preferable to place the marker M on the line segment ■.

3. When the marker M is placed on the graphic element A, the operator moves the pen 13 down and sends the coordinate data of the marker M to the processor 2 via the external device control circuit 21.
4. The processor 4 calculates the coordinate position of the marker M based on the coordinate data of the marker M, and sets an aperture area AP from the coordinate position of the marker M based on the preset aperture size. , stored in the aperture address section of aperture circuit n.

As shown in FIG. 3, the AP consists of a certain area centered on the marker M. If the size is made smaller, overlap with other graphic elements will be reduced and the desired graphic element will be detected. can.

5. Processor 4 controls the graphic control circuit 32 to set the graphic generation circuit n to the graphic element detection mode. When the graphics element detection mode is entered, graphics or character arcs from the vector generation circuit and character generation circuit are stored in the address pointer word.

6. Processor 4 sequentially reads the coordinate data of each graphic element stored in the graphic data memory n and sets it in the graphic control circuit 32. At this time, identification codes ID corresponding to each of the figures A, B, and C are added.

7. The graphic control circuit 32, depending on whether the read coordinate data of the graphic element is a graphic or a character,
The former goes to the vector generation circuit 33, and the latter goes to the character generation circuit 3.
8. In this embodiment, since the data is a graphic, the vector generation circuit 33 generates the graphic data of each graphic element and sequentially stores it in the identification code ID and tomonier address pointer of the graphic element. . At this time, since it is the graphic element detection mode, the graphic data is not written to the image memory 509, the comparison circuit 37 of the aperture circuit n
is the name of Anno 4 stored in the Anno Kucha address field A.
−Sequentially compare the addresses of the graphic data of each graphic element stored in the channel area and the address pointer,
When the address is within the aperture area, the detection of a graphic element, ie, an interrupt, is notified to the processor 4.

In Fig. 3, the addresses indicated by the coordinate data of figures B and C are not within the aperture area AP, so
While graphic elements B and C are being read, the comparison circuit 37 does not detect a match.

When figure 2) A is read out, the coordinate address of the line ■ is within the aperture ball AP, so the comparator circuit 37
informs processor 4 of the identification code ID of graphic element A by interrupt.

Note that the coordinate data of graphic elements is read from the graphic data memory 4 in the order in which they were written, that is, in the display unit 1.
The operations are performed in the order shown in 1.

10. When the processor 4 receives the notification of the detection of a graphic element, it calculates the original graphic element A based on its identification code TD(A).

When it is calculated that the detected graphic element is A, the processor notifies the host computer (not shown) via the interface circuit 19. The host computer executes the desired graphical processing on the graphical element A. If the processor 4 has a large processing capacity, it is of course possible to perform graphical processing within the processor 4. The graphic element may be the whole of A, or it may be a part of it. For example, in FIG. 3, it is of course possible to detect only the line segment (■) of the figure A.

The identification code ID of the graphic element is provided because it is necessary to recognize which graphic element it is, since the command setting method for the graphic control circuit is based on the FiFo format in order to increase the speed. Usually FiF.

It is sufficient to use a value that is cyclically counted with a number greater than or equal to the number of registers.

Figure 4 shows an example of the graphic data memory 4 and the identification code. As shown in the figure, the graphic data memory n is divided into a plurality of segments, and each segment indicates whether the graphic element is a figure or a character. The coordinate data of the graphic element is stored next to the graphic mode code shown. Therefore, if a segment number and a displacement amount (displacement number) to a desired graphic element in that segment are specified, the memory portion in which that graphic element is stored is specified.

Therefore, if the segment number and displacement number are used as identification codes for the graphic element, it is possible to specify the memory storing the desired graphic element and its coordinate data.

A part of a graphic element (for example, a graphic element) A
When detecting only a specific line segment (■) in the line segment (2), the segment number and the displacement number of the memory portion where the line segment (2) is stored may be used as the identification code.

〔Effect of the invention〕

As explained above, the present invention utilizes a figure generation circuit and an aperture circuit, and detects a shape element through simple data processing of simply comparing the coordinate address of the figure element and the aperture area. Therefore, graphic element detection can be performed quickly and easily, and the response in graphic processing can also be improved.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional rask scan type graphic display processing device, FIG. 2 is a block diagram of a graphic display processing section used in the graphic element detection method of the present invention, and FIG. 3 is a diagram showing the graphics displayed on the display section. FIG. 4 is an explanatory diagram of elements and apertures, and FIG. 4 is an explanatory diagram of graphic data memory and identification codes. In the figure, 10 is a conventional Rusk scan type graphic display processing device, 11 is a display section, 12 is a coordinate detection device, 13 is a pen, 1
4 is a graphic display processing section, 19 is an interface circuit, numeral 4 is a graphic display processing section of the present invention, 21 is an external device control circuit,
B is a figure data memory, O is a figure generation circuit, U is a memory control circuit, 5 is an image memory, station is a P/S converter, n is an aperture circuit, column is a control program section, 4 is a processor, 3o is a control 31 is a data signal path; 32 is a graphic control circuit; ``A'' is a character generation circuit; 35 is an address pointer; 36 is an aperture address section; 37 is a comparison circuit. Patent applicant Fujitsu Limited

Claims (1)

[Claims] A Rusk scan type graphic display processing device equipped with a coordinate detection device includes an aperture area setting means for setting a fixed aperture area based on coordinate data for detecting graphic elements from the coordinate detection device, and storage in a graphic data memory. a figure generating means for sequentially reading out each figure element and outputting the address and identification code of each figure element;
? - Compare the address of the graphic element from the cha area and the graphic generation circuit, and the address of the graphic element is A/4.
1. A graphic element detection method comprising: a comparison circuit that notifies that the graphic element has been detected when the graphic element is within the cha area by means of its identification code.